Illuminating prism



FIG. 1 is a perspective view of an illuminating prism showing our new design;

FIG. 2 is a right side view thereof, the left side view being a mirror image of the right side view;

FIG. 3 is a top view thereof;

FIG. 4 is a rear view thereof, having a sanded surface;

FIG. 5 is a front view thereof, having a mirror surface; and,

FIG. 6 is a bottom view thereof.

The broken lines (where present) in all figures illustrate portions of the illuminating prism that form no part of the claimed design. 

CLAIM The ornamental design for an illuminating prism, as shown and described. 